Door-lock.



c. RuBRKBNs. DOORLOGK.

APPLIOATION FILED NOV. 30, 1909.

- Patented Ju1y5, 1910.

2 SHEETS-SHEET 1.

A fr Q 1' w y Q l RMK. ENS

`rus MORRIS Pirlks co.. wAlnmcmN, D. c.

c.- R. BRKENS.

DOOR 1.00K. nrmonzon FILED nov. so. 190'9.

Patented July 5, 1910.

' 2 ennuis-s113151 z'.

'ruk Nonni: rlrrlrco., vlMmNaToN. m c( UNITED STATES PATENT OFFICE.

CHARLES n. ERKENS, or NEW YORK, N. Y.

Patented July 5, 1910. Serial No. 530,576.

963,427. Specification of Letters Patent.

Application led November 30, 1909.

To all whom 'it may concern:

Be it known that I, CHARLES R. ERKENS, a citizen of the United States,residing at New York city in the county of New York and State of ewYork, have invented certain new and useful Improvements in Door- Locks;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to new and useful improvements in door locks andespecially to the class adapted to permit the door being partly openedforventilating purposes, yet not sufficiently to allow entrance from theoutside.

An object of my invention is to provide a lock having a pair of lockingbolts, one working within the other and a further object is to provide adevice to coperate with one of said locking bolts, in order that thedoor may be partly opened yet secured against entrance from the outside.

These and other objects will be more particularly referred to in theaccompanying specication and claims.

In the drawings forming a part of this application, Figure 1 is a frontelevation of my improved lock in its assembled position. Fig. 2 is aperspective view showing how the lock would appear in coperation with adoor, said door being partly open. Fig. 3 is a longitudinal sectionalview showing both of the locking bolts extending outwardly for thepurpose of locking the door. Fig. 11 is a transverse sectional view ofthe lock. Fig. 5 is a longitudinal sectional View showing both of thelocking bolts withrawn, in order that the door may be opened. Fig. 6 isa longitudinal sectional View showing the secondary bolt extended beyondthe lock. Fig. 7 is a detail plan view of the main locking bolt. Fig. 8is a detail plan view of the secondary locking bolt. Fig. 9 is afragmentary det-ail view of the guard used in connect-ion with my lock.

Referring to the drawings in which simi` lar reference numeralsdesignate corresponding parts throughout the several parts, 1 and 2 arethe usual form of door and doorframe and upon the frame 2, is secured byany preferred means, a keeper 3, said keeper consisting of the usualbase and top plates secured by means of screws et and 4c or the like,while in the top plate of said keeper is fashioned a substantially Tshaped opening 5, and a guard 6 is pivotally mounted on a bolt 7 withinthe keeper 3, said guard comprising a substantially rectangular 'stripof metal or the like, having a portion of its [surface stamped out toform a channel, said channel being of. the same width from a pointadjacent the free end of said guard and extending for a part of thelength thereof to a point adjacent the lower end of the keeper 3, whereit is broadened out in order that a substantially T shapedlocking bolt 8may pass into the keeper 9 and be held in engagement by the guard whensaid bolt is moved laterally along the narrow portion of the channel.

The secondary locking bolt 8 is adapted to move longitudinally throughthe main locking bolt 9, each of the said bolts being operation of eachby means of knobs 10 and 11 respectively, extending beyond the faceplate 12 of the housing 13, the knob 10 be- 14 cut 1n the face plate 12,the tion of said channel having .a shoulder 15 in which the knob 10 isadapted to rest when it is desired to secure said knob in its normalclosed position.

Referring' to Fig. 8, it will be seen how the secondary locking bolt 8is constructed. The stem 16 thereof is of T shaped outline and to thehead 17 ofthe T, near its ends, are secured the outer ends of parallelrods 18, 18, having applied to their inner ends a plate 19.

By referring to Fig. 5, it will be seen how the secondary bolt 8 is heldin a retracted position in order to overcome the pressure exerted by thesprings 20 and 20 which encompass the rods 18 and 18. Integral with theknob 11 is a dog 21 which is designed to rotate with said knob and bearagainst the plate 19 when it is desired to hold the secondary bolt 8 ina retracted position. A pair of oppositely disposed lugs 22 and 22extend inwardly from the housing, lwhile one end of the springs 20 and20 respectively bear against said lugs 'and the rods 18 and 18 areadapted to move laterally through openings provided in said lugs. Whenitis desired to release the secondary bolt, the knob 11 is rotated outof its locked position, thus releasing the doo' 21 from pressureagainstv the plate 19 and thus the springs so constructed as to allow'the independent 4with the dog 21 `to lock the door,

' the lock without what would otherwise ingly in order y j unlocking thedoor i keeper, through the f Y herein shown,

Vlocking bolt has tively,

Y the secondary lockingv 20 and 20 having one end in engagement with themember 17 respectively will cause said secondarylocking bolt 8 to slidebeyond the housing and also out of the main locking bolt 9, all asdisclosed in Fig. 6.

y Referring to Fig. 7, ,it will be seen how the main locking'bolt isconstructed. Y' Said main a 'channel extending longitudinallytherethrough corresponding in outline to the shape of thesecondarylocking bolt 8,-while adjacent the inner end is a pair ofvertically extending lugs 23 and 23 to which are secured rodsl 24 and 24respecwhile a dog 25 islet into and pivoted to saidV main bolt, saiddoglbeing also engaged at y*one end by the knob 10. 'A shoulder 26 iscut in the endof the dog 25 adjacent said knob and -designed toycoperate secondary locking bolts are sprung outward thus preventingeither of from being drawn within a suitable key.

`By referring to Fig. 3, it will be appreciated how the -dogs 21 and 25cooperate to hold thelocking bolt 9 projected and in be thecorresponding 8, although retracted The end Vof the dog 25 vopposite tothe end which has a shoulder 26 is substantially circular, said circularportion finding a bearingsurface on lthe inclosing walls ofV the cut outportion in which saidl lockin bolts position of the bolt within the bolt9.

thexdog is countersunk, so whenthe knob 10 is slid along the channel 14,the dog 25 will draw -the'locking bolt 9 inwardly andthe pivoted end'ofsaid dog will'rotate` accordto facilitate the operation. Of course, themechanism shown and described so far, is for the lock as applied to theinside of the door, but for purposes of from the outside, means maybeprovided to coperate with the herein described lock, whereby a kkeymaybe inserted from the outside and the door opened.

Should the `door have been leftopen and bolt in engagement with theguard 6, it 'would vbe necessaryfirst to close the door inorder that thesecondary locking boltmight register within the keeper 3, vafter which'the key might. be turned to withdraw said locking bolt from within thewide vportion of the channel in said guard and :thence into the housing13. f Y y Although the .arrang'ement'v ofrparts, as is the preferredform, yet I when both the main andv wish it understood that I am not ytobe restricted by the same, should I care to make any changes withoutdeparting from the spirit of the invention. What I claim is 1. A doorlock, comprising a main locking bolt carrying a dog thereon, a secondarylocking bolt adapted to move longitudinally through said main lockingbolt, said secondary locking bolt havingspring encompassed .parallelrods projectingtherefrom and connected at their ends, an additional dogadapted to have engagement with said other dog and coperating with saidsecondary bolt, a keeper adapted to receive the end of -said secondarybolt and \a slotted guard adapted to receive thel stem thereof andpermit said stem to travelV therein when said main boltV is not in use.

2. A door lockcomprising a main locking bolt, a substantially T shapedsecondary locking bolt adapted to move longitudinally in said mainlocking bolt, a dog pivoted to saidv main locking. bolt, meansprojecting through an arcuate channel in the locking case for movingsaiddog, an additional dog adapted to engage withthe first referred to dogfor holding said main bolt in projected position and means for actuatingsaid additional dog, said secondary locking bolt hav- 'ing parallel rodsprojecting vtherefrom and through, means to operate said main locking ubolt, additional means to operate said secondarybolt independently ofsaid main bolt and adapted to engage said'rst referred to means forholding said main bolt projected, a keeper adapted to receive the outerend of said secondary bolt Aand a slotted guard adapted to receive thestem'th'ereof.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. j l

i CHAS. R. ERKENS.

Witnesses: f

W'rLLrAiir LINDER, ARTHUR E., Woon.

